Fig. 3.—Heart of Australian Cassowary (Casuarius australis), prepared similarly to the heart of sheep, figured in Figure 2, and showing at M the moderator band. A line of papillary upgrowths are indicated at the upper end of the upper segment of the muscular auriculo ventricular valve, passing downwards towards the point of origin of the moderator band from the septum. They extend in the specimen over a space of about three-eighths of an inch, and are indicated in the woodcut by dark transverse lines.
